====== Pediatric diffuse astrocytoma ====== In pediatric [[diffuse astrocytoma]]s (age < 20 years), most of the molecular markers differ from their adult counterparts: [[IDH mutation]]s and [[TP53]] & [[ATRX]] mutations are not present, and mutation of [[H3K27M]] can occur as in high-grade pediatric gliomas. Markers are also dependent on tumor location. Unlike their adult counterpart, these tumors rarely undergo malignant degeneration ((Broniscer A, Baker SJ, West AN, et al. Clinical and molecular characteristics of malignant transforma- tion of low-grade glioma in children. J Clin Oncol. 2007; 25:682–689))